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实验结果表明:以1mg/1和3mg/1两种浓度磷化氢的低氧气体(氧5%左右,以下同)通入装有测氧仪电极的瓶中,处理电极720小时;以磷化氢浓度1mg/1的低氧气体连续通过测氧仪电极200小时,以及以国产磷化铝在空气中潮解产生磷化氢气体(平均磷化氢浓度1mg/1)连续通过测氧仪电极300小时,电极均仍能正常工作.在处理过程中电极通电与不通电无差别.CY-7型测氧仪是粮食缺氧贮藏中分析氧浓度的专用仪器.目前,不少地方在进行缺氧贮藏对,常伴随着低剂量的磷化氢熏蒸即“低氧低剂量”贮藏.磷化氢气体对测氧仪电极的使用时间是否有影响,是人们都非常关心的问题.为此,我们测定了不同浓度的磷化氢气体对CY-7型测氧仪电极的影响.
The experimental results showed that: the low oxygen gas (about 5% oxygen, the same below) passed into the bottle with the oxygen meter electrode at the concentrations of 1mg / 1 and 3mg / 1, the electrode was treated for 720 hours; The low-oxygen gas with a hydrogen concentration of 1 mg / 1 continuously passes through the oxygen meter electrode for 200 hours and the domestic phosphide gas is deliquesced in the air to produce phosphine gas (the average phosphine concentration is 1 mg / 1) continuously through the oxygen meter electrode 300 hours, the electrodes are still working properly in the process of electrode energized and no power no difference .CY-7-type oxygen meter is a special instrument for the analysis of oxygen concentration in food hypoxia storage.At present, many places in the absence of Oxygen storage pairs, often accompanied by low doses of phosphine fumigation that is “hypoxia low dose ” storage.Phosphine gas on the oxygen meter electrode use time whether it is people are very concerned about the problem. This, we measured the different concentrations of phosphine gas on the CY-7-type oxygen meter electrode.